Abstract Objective: To investigate the usefulness, reliability, quality, and content of Portuguese-language YouTube videos on COVID-19. Material and Methods: Three keywords selected on Google Trends were searched on YouTube, and the 60 first videos listed with each term were analyzed. Two calibrated researchers evaluated the reliability (DISCERN Modified Scale), the quality (Global Quality Score - GQS), and the usefulness of videos for the users (COVID-19 Specific Score - CSS). The number of views, likes, and engagement were also analyzed. The data were evaluated by the Mann-Whitney test and Spearman correlation (α=5%). Results: 59 videos were included. The average scores of quality, reliability, and usefulness were 3.0 (±1.1), 3.2 (± 0.8), and 1.5 (± 0.9), respectively. Two-thirds of the videos (64.4%) had low/moderate quality, and the majority (76.2%) were about signs and symptoms. The numbers of views (p=0.005), likes (p=0.006), and engagement (p=0.014) were significantly higher in moderate/good quality videos. The number of comments (p=0.007), duration of videos (p=0.004), and the DISCERN score (p<0.001) were significantly higher in videos made by health professionals. The general quality of the videos was positively correlated to the CSS scores, number of views, likes, and engagement (p<0.05). Conclusion: Most videos had moderate quality and reliability and low usefulness for the users.

ABSTRACT To investigate individual and contextual factors associated with seeking treatment for traumatic dental injuries. A cross-sectional study was conducted with 739 pairs of guardians and children. Guardians answered a questionnaire addressing sociodemographic characteristics, seeking treatment for a tooth injury in the child, and the Oral Health Literacy-Adult Questionnaire. Descriptive analysis and unadjusted and adjusted multilevel Poisson regression analysis (p<0.05). The prevalence of seeking treatment for traumatic dental injury was 44.7%. Sociodemographic variables associated were white skin of the child (PR = 1.30; 95% CI: 1.08-1.76), mother’s age older than 35 years (PR = 1.70; 95% CI: 1.50-1.90), married parents (PR = 1.93; 95% CI: 1.70-2.23), guardians with more than eight years of schooling (PR = 2.00; 95% CI: 1.76-2.23), with adequate oral health literacy (PR = 3.33; 95% CI: 3.01-3.62) and the daily use of electronic devices by the child (PR = 1.26; 95% CI: 1.02-1.50). On the contextual level, attending a private school (PR = 1.77; 95% CI: 1.02-3.05) and the number of primary care units with oral health teams in the school district (PR = 1.78; 95% CI: 1.12-2.38) remained associated. Among the children who suffered TDI, adequate oral health literacy on the part of the parents stood out among the factors associated with seeking treatment.

Resumo Investigar fatores individuais e contextuais associados à busca de tratamento para lesões dentárias traumáticas. Foi realizado um estudo transversal com 739 pares de responsáveis e crianças. Os responsáveis responderam a um questionário abordando características sociodemográficas, busca por tratamento para traumatismo dentário na criança e o Questionário de alfabetização em saúde bucal para adulto. Análise descritiva e análise de regressão de Poisson multinível não ajustada e ajustada (p<0,05) foram realizadas. A prevalência de busca de tratamento para lesão dentária traumática foi de 44,7%. As variáveis sociodemográficas associadas foram a pele branca da criança (RP = 1,30; IC 95%: 1,08-1,76), idade da mãe maior que 35 anos (RP = 1,70; IC 95%: 1,50-1,90), os responsáveis casados (RP = 1,93; IC 95%: 1,70-2,23), com mais de oito anos de estudo (RP = 2,00; IC 95%: 1,76-2,23), com alfabetização adequada em saúde bucal (RP = 2,00; IC 95%: 1,76-2,23) e uso diário de dispositivos eletrônicos pela criança (RP = 1,26; IC 95%: 1,02-1,50). No nível contextual, frequentar uma escola particular (PR = 1,77; IC 95%: 1,02-3,05) e a quantidade de unidades básicas de saúde com equipes de saúde bucal no distrito sanitário da escola (PR = 1,78; IC 95%: 1,12-2,38) permaneceram associados. Entre as crianças que sofreram TDI, a alfabetização em saúde bucal adequada dos pais foi um fator que se destacou na busca por tratamento.

Abstract The present study aimed to perform the cross-cultural adaptation of the Digital Health Literacy Instrument (DHLI) for native Brazilian Portuguese-speaking adolescents (DHLI-BrA). Cross-cultural adaptation consisted of the following steps: translation, assessment, and adjustments by the expert committee to ensure cultural equivalence; back-translation, and synthesis of back-translations. Cognitive testing was then performed in a pretest with adolescents using cognitive interviews with probing questions on the item's understanding interpretation and response options. Cronbach’s alpha coefficient and McDonald’s omega were used to estimate the instrument’s reliability. Forty-two Brazilian adolescents participated in the study (mean age: 16.0 ± 2.0 years; range: 13 to 19 years). Items that were difficult to understand were adapted to the context of Brazilian adolescents. Cronbach’s alpha coefficient and McDonald’s omega for the 21 items of the DHLI-BrA were, respectively, 0.79 and 0.80. Cronbach’s alpha coefficient for the subscales of the self-report instrument was 0.53-0.79 (range), demonstrating good reliability in the total instrument and moderate reliability in the subscales. This study provides the cross-cultural adapted version of the Digital Health Literacy Instrument (DHLI), which is an instrument for measuring digital Health literacy, for use in Brazilian adolescents (DHLI-BrA).

Resumo O estudo teve o objetivo de adaptar transculturalmente o Digital Health Literacy Instrument (DHLI) para adolescentes nativos do idioma português do Brasil (DHLI-BrA). O estudo de adaptação transcultural consistiu nas seguintes etapas: tradução, avaliação e adequação de equivalência cultural da tradução por comitê de especialistas; retrotradução e síntese das retrotraduções. Foi realizada a testagem cognitiva em pré-teste com adolescentes, utilizando-se entrevistas cognitivas com perguntas de sondagem sobre a compreensão e interpretação dos itens e opções de resposta. O alfa de Cronbach e ômega de McDonald’s foram utilizados para estimar a confiabilidade do instrumento. Participaram do pré-teste 42 adolescentes brasileiros com média de idade de 16,0 ± 2,0 (variação de 13-19) anos. Os itens com dificuldade de compreensão foram adaptados ao contexto dos adolescentes brasileiros. O coeficiente alfa de Cronbach e o ômega de McDonald’s, para os 21 itens do DHLI-BrA foi respectivamente, 0,79 e 0,80. O coeficiente alfa de Cronbach para as subescalas do instrumento de autorrelato foi de 0,53-0,79 (variação), demonstrando boa confiabilidade no instrumento total e confiabilidade moderada nas subescalas. Este estudo fornece a versão adaptada transculturalmente do Digital Health Literacy Instrument (DHLI), um instrumento de mensuração do letramento digital em saúde, para utilização em adolescentes brasileiros (DHLI-BrA).

Abstract The aim of the present study was to investigate the impact of oral health literacy (OHL) on conceptions of care and behaviors related to COVID-19. The sample came from two preliminary cross-sectional studies that determined the level of OHL of parents/guardians of six-to-12-year-old children in two major Brazilian cities (Curitiba and Belo Horizonte). Functional OHL was measured using the Brazilian version of the Rapid Estimate of Adult Literacy in Dentistry (BREALD-30) and the Health Literacy Dental Scale (HeLD-14) for the evaluation of interactive OHL. Participants were recruited through e-mail, social media, and telephone contact. The questionnaire on conceptions of care and behaviors related to COVID-19 was created based on the guidelines of the World Health Organization. Two hundred nineteen individuals participated in the study. There was no significant difference in socioeconomic and demographic variables and in the medians of BREALD and HeLD-14 between the two cities (P>0.05). Higher levels of functional OHL were associated with an appropriate conception that individual care affects collective care (P=0.038), but with an inappropriate conception of seeking medical assistance in cases of mild symptoms (P=0.030). Higher levels of interactive OHL were related to social distancing behavior in the city of Curitiba (P=0.049) and in the overall sample (P=0.040). It is concluded that functional OHL was associated with two of the investigated conceptions about COVID-19, while interactive OHL was associated with social distancing behavior. These data may suggest that different dimensions of the OHL can have an impact on different aspects of coping with the pandemic.

Abstract The study analyzed the clarity of publications on human papillomavirus (HPV) in the Instagram profiles of official Brazilian health agencies. An infodemiological study analyzed publications on HPV in the 81 Instagram profiles selected from the Health Ministry, States’ Health Departments, and dental councils and associations. The following data were collected: classification of content, type of profiles, type of media, how the content was addressed, number of posts, frequency, likes, comments, viewings, and hashtags, and how the HPV vaccine was addressed. The clarity of the educational publications was assessed using the Brazilian version of the Clear Communication Index (BR-CDC-CCI). Data analysis was performed with Spearman’s correlation and the Mann-Whitney test (p < 0.05). A total of 504 publications on HPV were found. The average number of likes was 528.3 (SD = 2388.2) and the average BR-CDC-CCI score was 67.1 (SD = 14.1). The quality and clarity of the information was considered adequate (BR-CDC-CCI score ≥ 90) in 6.9% of the publications. A weak positive correlation was found between the number of likes and both the BR-CDC-CCI score (r = 0.195) and number of posts (r = 0.124). Publications from the Health Ministry had a significantly higher BR-CDC-CCI score (72.9) compared to the other profiles analyzed (p = 0.01). Most publications concerned government actions, had low engagement, and written educational information was of low clarity and quality. However, the effort to reach the population was evident, with an increase in publications over the years.

Abstract The aim of the present study was to investigate predictors of malocclusion in Brazilian schoolchildren eight to ten years of age based on a causal directed acyclic graph model. A cross-sectional study was conducted with 739 schoolchildren eight to ten years of age. Parents/guardians provided information on sleep disorders of the child (Sleep Disturbance Scale for Children) and family characteristics (Family Adaptability and Cohesion Evaluation Scale). The diagnosis of malocclusion was performed by four trained examiners using the Dental Aesthetic Index. Control variables were selected using a directed acyclic graph. Descriptive analysis was performed, followed by robust logistic regression analysis for complex samples (α = 5%). The following variables were associated with malocclusion in the final model: sleep disorders (OR = 2.61; 95%CI: 2.43–2.86), mouth breathing (OR = 1.04; 95%CI: 1.02–1.99), non-nutritive sucking habits (OR = 2.45; 95%CI: 2.37–4.85), and obesity (OR = 1.54; 95%CI: 1.02–2.33). Sociodemographic characteristics, family functioning, and premature tooth loss did not remain associated with malocclusion. Sleep disorders, mouth breathing, sucking habits, and obesity are predictors of malocclusion in schoolchildren eight to ten years of age.

ABSTRACT Background Sleep bruxism (BS) is defined as involuntary jaw movements characterized by grinding and clenching teeth. Objective To verify the association between chronotype, sleep quality, and self-reporting of BS in dental students. Method A cross-sectional study was conducted with 214 undergraduate dental students at a public university in northeast Brazil. The participants answered the Munich Chronotype Questionnaire for the identification of chronotype and another questionnaire regarding daily aspects to collect information about sleep quality, self-reported sleep bruxism, the use of sleeping pills, snoring, concentration during daily activities and energy upon waking. Results The prevalence of self-reported sleep bruxism was 11.0%. In the final model, the eveningness chronotype (OR = 23.00; 95% CI: 2.36-223.84, p = 0.007), habitual snoring (OR = 3.12; 95% CI: 1.31-7.39, p = 0.01) and low energy upon waking in the morning (OR = 2.37; 95% CI: 1.96-5.58, p = 0.040) were associated with self-reported sleep bruxism. Conclusion The evening chronotype, presence of snoring, and low energy when waking up in the morning influenced self-reporting of sleep bruxism among undergraduate dental students.

RESUMO Introdução O bruxismo do sono (BS) é definido como movimentos involuntários da mandíbula caracterizados por ranger e apertar os dentes. Objetivo Verificar se o cronotipo e a qualidade do sono estão associados ao autorrelato de BS em graduandos de Odontologia. Método Um estudo transversal com 214 estudantes de uma universidade pública do Nordeste do Brasil. Os participantes responderam ao Morningness-Eveningness Questionnaire para identificar os cronotipos e outro questionário sobre aspectos diários em que foram coletadas informações sobre qualidade do sono, autorrelato de bruxismo do sono, uso de pílulas para dormir, ronco, concentração nas atividades diárias, energia ao acordar. Resultados A prevalência de autorrelato do bruxismo do sono foi de 11,0%. No modelo final, o cronotipo noturno (OR = 23,00; 95% IC: 2.36-223.84, p = 0,007), o hábito de roncar (OR = 3,12; 95% IC: 1.31-7.39, p = 0,01) e o baixo nível de energia ao acordar pela manhã (OR = 2,37; 95% IC: 1.96-5.58, p = 0,04) estiveram associados com o autorrelato de BS. Conclusão O cronotipo noturno, a presença do ronco e a baixa energia ao se levantar pela manhã influenciaram o autorrelato de bruxismo do sono entre os estudantes de graduação em Odontologia.

Abstract: Specific measures to evaluate positive oral health have been in a nascent stage in Dentistry, especially in developing countries. The present study aimed to translate, cross-culturally adapt and evaluate the psychometric properties of the Brazilian version of Positive Oral Health and Well-Being (B-POHW). After forward-backwards translation to Brazilian Portuguese language, the cross-cultural adaptation of B-POHW was pretested, followed by the main study to perform psychometric analysis. We tested the model fit by Confirmatory Factor Analysis with categorical factor indicators in bifactor and simple structure models on a sample of 209 participants (mean age: 39.36 ± 12.26. Questionnaires about sociodemographic status, self-reported oral health-related outcomes, and general well-being were administered and used as external validation measures. Moreover, dental caries experience was clinically diagnosed. For test-retest reliability, 53 participants completed the B-POHW a fortnight later. The following results were found: a) the bifactor model presented the best model fit; b) the B-POHW demonstrated satisfactory internal consistency (Cronbach's α and McDonald's ω > 0.8); c) the intraclass correlation coefficient suggested good reliability for the Global Factor of B-POHW in the test-retest (ICC = 0.84); d) evidence based on other variables and construct representation was in line with the positive oral health framework. The B-POHW is psychometrically sound to be used in a Brazilian context, and evidence of its internal structure confirmed its theoretical framework for measuring positive oral health. These findings advance in holistic approaches, enabling to assess positive oral health in Dental practice in Brazil.

Abstract: This study aimed to determine the impact of the COVID-19 pandemic on sleep quality and possible sleep bruxism (SB) in children eight to ten years of age. The study hypothesis was that sleep disturbances influenced a higher occurrence of bruxism during the COVID-19 pandemic. A longitudinal study was conducted at two time points: in person prior to the COVID-19 pandemic (T1), and online during the pandemic (T2). The sample comprised 105 children. Parents/caregivers answered a questionnaire addressing sociodemographic characteristics, the use of electronic devices, reported (vs. clinical) SB, and the Sleep Disturbance Scale for Children (SDSC) at both T1 and T2. McNemar’s and Wilcoxon’s tests were used to compare SB and sleep disorders at both time points. Poisson regression analysis determined the relative risk (RR) among the variables, and the incidence of possible SB (p≤0.05). The comparison of the two time points (T1 and T2) revealed a significant increase in possible SB (p<0.01) and sleep disorders (p < 0.04). Children whose parents had a lower schooling level (RR: 2.67; 95%CI: 1.19–6.01), those with their own electronic devices (RR: 1.97; 95%CI: 1.09–2.50), and those with sleep disorders during the pandemic (RR: 1.74; 95%CI: 1.35–2.24) were at greater risk of developing SB during the pandemic. Moreover, the incidence of bruxism and sleep disorders was greater during the pandemic. The factors influencing SB incidence during the pandemic were a lower level of mothers’ schooling, greater access to electronic devices, and the occurrence of sleep disorders.

Abstract: The authors developed and validated a short form of the Brazilian Oral Health Literacy Assessment Task for Paediatric Dentistry (BOHLAT-P). Data included responses from 200 parents of preschoolers to sociodemographic and oral health service access questions on the BOHLAT-P, the Brazilian Rapid Estimate of Adult Literacy in Dentistry (BREALD-30), and the Brazilian Early Childhood Oral Health Impact Scale (B-ECOHIS). Data on the preschoolers’ dental caries experience (ICDAS-II) were also included. An item response theory-based approach was employed to develop the short form, while confirmatory factor analysis evaluated the instrument dimensionality. The validity and reliability of the short form were tested by statistical analysis using BREALD-30, B-ECOHIS, and sociodemographic and dental caries experience data. The short form (BOHLAT-P-30) comprises 30 items, is unidimensional, and presents better model fit estimates (TLI = 0.94; CFI = 0.94; RMSEA = 0.05) than those of the BOHLAT-P. Moreover, BOHLAT-P-30 demonstrated excellent reliability (Cronbach's alpha = 0.91; intraclass correlation coefficient [ICC] = 0.95). BOHLAT-P-30 scores were positively correlated with BREALD-30 scores (r = 0.71), with the number of years of schooling (r = 0.60), and with the number of hours spent reading (r = 0.33). BOHLAT-P-30 scores were negatively correlated with B-ECOHIS scores (r = -0.21), and with the number of teeth with cavitated caries (r = -0.18). After controlling for confounding factors, BOHLAT-P-30 scores were not found to be associated with caries presence, or with the number of teeth with cavitated caries. The BOHLAT-P-30 had properties similar to those of the BOHLAT-P, and proved to be a valid measure to assess the OHL of Brazilian parents.

Abstract The aim of the present study was to investigate whether possible awake bruxism (AB) is associated with the use of electronic devices and the practice of sports in schoolchildren aged eight to ten years. A cross-sectional study was conducted with 739 students in public and private schools in the city of Campina Grande, Brazil. Parents/guardians answered a questionnaire addressing sociodemographic data. The children answered questions about use of electronic devices, practice of sports, and AB. Statistical analysis involved robust logistic regression for complex samples (α = 5%). The prevalence of possible AB was 14.9%. Being female (OR = 1.71, 95%CI: 1.11–2.63), being the middle child (OR = 2.19, 95%CI: 1.14–3.88), having unmarried parents (OR = 1.73, 95%CI: 1.13–2.65), daily use of a cell phone/tablet/computer (OR = 1.82, 95%CI: 1.19–2.80), use of electronic devices for two or more hours per day (OR = 1.97, 95%CI: 1.35–2.86), and playing sports in and/or out of school (OR = 1.60, 95%CI: 1.18–2.52) remained associated with possible AB in the final model. The presence of possible AB was influenced by the use of electronic devices and the practice of sports among schoolchildren aged eight to ten years.

Abstract Objective: To investigate the association between oral health problems and being ashamed of smiling or speaking among Brazilian adolescents. Material and Methods: This was a population-based cross-sectional study carried out with secondary data from 7,328 12-year-old Brazilian adolescents from the latest Brazilian national oral health survey (SB Brasil 2010). The question “In the previous 6 months, have you been ashamed of smiling or speaking due to your teeth?” was the outcome variable. Calibrated examiners performed clinical examinations on adolescents for the diagnosis of dental caries (DMF-T), dental trauma, dental fluorosis and occlusal alterations. Data were analyzed descriptively and by Poisson unadjusted and adjusted Poisson regression analysis (p<0.05). The final model was controlled by family income. Results: The prevalence of being ashamed of smiling or speaking was 13.6%. The following variables were associated with the outcome: female sex (PR= 1.33; 95% CI: 1.17-1.53), cavitated dental caries on upper incisors (PR= 1.81; 95% CI: 1.51-2.15), dental trauma (PR= 1.36; 95% CI:1.16-1.60), increased maxillary overjet (PR= 1.36; 95% CI:1.18-1.57), dental crowding (PR= 1.60; 95% CI:1.40-1.83), midline diastema (PR= 1.30; 95% CI:1.11-1.44), tooth loss (PR= 1.45; 95% CI:1.16-1.80), mild/questionable dental fluorosis (PR= 1.23; 95% CI:1.06-1.44) and moderate/severe dental fluorosis (PR= 1.67; 95% CI:1.15-2.44). Conclusion: Oral health problems that impact dental aesthetics were predisposing factors for being ashamed of smiling or speaking in Brazilian adolescents.

Resumo Este estudo avaliou a associação de fatores sociodemográficos, familiares e do tipo de serviço odontológico utilizado ao alfabetismo em saúde bucal em pré-adolescentes. Trata-se de um estudo transversal com 740 escolares. Foram avaliados o alfabetismo em saúde bucal (BREALD-30), fatores sociodemográficos, tipo de serviço odontológico e funcionalidade familiar (FACES III) por meio de questionários validados. A associação entre as variáveis foi avaliada por meio de regressão de Poisson robusta (α=5%). Um maior alfabetismo em saúde bucal foi associado ao sexo feminino (RR=1.09; IC95%: 1.03-1.14), coesão familiar do tipo conectada (RR=1.12; IC95%: 1.05-1.20), adaptabilidade familiar dos tipos rígida (RR=1.14; IC95%: 1.04-1.25) e estruturada (RR=1.11; IC95%: 1.04-1.20), escolaridade materna superior a oito anos de estudo (RR=1.16; IC95%: 1.10-1.22), idade do responsável superior a 38 anos (RR=1.07; IC95%: 1.02-1.13) e uso de serviços odontológicos privados (RR=1.06; IC95%: 1.01-1.12). O nível de alfabetismo em pré-adolescentes foi associado ao sexo, estrutura familiar, idade e escolaridade do responsável e tipo de serviço odontológico utilizado.

Abstract The aim of this study was to evaluate associations between oral health literacy and family, sociodemographic and dental service characteristics in early adolescents. A cross-sectional study was conducted with 740 schoolchildren. The following variables were investigated using validated questionnaires: oral health literary (BREALD-30), sociodemographic characteristics, type of dental service and family functioning (FACES III). Associations were tested using robust Poisson regression analysis (α=5%). Higher oral health literacy was associated with the female sex (RR=1.09; 95%CI: 1.03-1.14), connected type of family cohesion (RR=1.12; 95%CI: 1.05-1.20), rigid (RR=1.14; 95%CI: 1.04-1.25) and structured (RR=1.11; 95%CI: 1.04-1.20) types of family adaptability, more than eight years of mother’s schooling (RR=1.16; 95%CI: 1.10-1.22), age of caregiver more than 38 years (RR=1.07; 95%CI: 1.02-1.13) and the use of private dental services (RR=1.06; 95%CI: 1.01-1.12). The level of oral health literacy in early adolescents was associated with sex, family structure, mother’s schooling, caregiver’s age and type of dental service used.

Resumo Este estudo avaliou a associação de fatores sociodemográficos, familiares e do tipo de serviço odontológico utilizado ao alfabetismo em saúde bucal em pré-adolescentes. Trata-se de um estudo transversal com 740 escolares. Foram avaliados o alfabetismo em saúde bucal (BREALD-30), fatores sociodemográficos, tipo de serviço odontológico e funcionalidade familiar (FACES III) por meio de questionários validados. A associação entre as variáveis foi avaliada por meio de regressão de Poisson robusta (α=5%). Um maior alfabetismo em saúde bucal foi associado ao sexo feminino (RR=1.09; IC95%: 1.03-1.14), coesão familiar do tipo conectada (RR=1.12; IC95%: 1.05-1.20), adaptabilidade familiar dos tipos rígida (RR=1.14; IC95%: 1.04-1.25) e estruturada (RR=1.11; IC95%: 1.04-1.20), escolaridade materna superior a oito anos de estudo (RR=1.16; IC95%: 1.10-1.22), idade do responsável superior a 38 anos (RR=1.07; IC95%: 1.02-1.13) e uso de serviços odontológicos privados (RR=1.06; IC95%: 1.01-1.12). O nível de alfabetismo em pré-adolescentes foi associado ao sexo, estrutura familiar, idade e escolaridade do responsável e tipo de serviço odontológico utilizado.

Abstract The aim of this study was to evaluate associations between oral health literacy and family, sociodemographic and dental service characteristics in early adolescents. A cross-sectional study was conducted with 740 schoolchildren. The following variables were investigated using validated questionnaires: oral health literary (BREALD-30), sociodemographic characteristics, type of dental service and family functioning (FACES III). Associations were tested using robust Poisson regression analysis (α=5%). Higher oral health literacy was associated with the female sex (RR=1.09; 95%CI: 1.03-1.14), connected type of family cohesion (RR=1.12; 95%CI: 1.05-1.20), rigid (RR=1.14; 95%CI: 1.04-1.25) and structured (RR=1.11; 95%CI: 1.04-1.20) types of family adaptability, more than eight years of mother’s schooling (RR=1.16; 95%CI: 1.10-1.22), age of caregiver more than 38 years (RR=1.07; 95%CI: 1.02-1.13) and the use of private dental services (RR=1.06; 95%CI: 1.01-1.12). The level of oral health literacy in early adolescents was associated with sex, family structure, mother’s schooling, caregiver’s age and type of dental service used.

Resumo O objetivo deste estudo foi avaliar o efeito de um nanocomplexo recém-desenvolvido formado entre hidroxipropil-β-ciclodextrina e 1% de tetrafluoreto de titânio (TiF4) após distintos períodos de complexação (12/72 horas) na desmineralização do esmalte bovino in vitro. Blocos de esmalte (n = 60) foram alocados para cada grupo: água Mili-Q, hidroxipropil-β-ciclodextrina, TiF4 a 1%, hidroxipropil-β-ciclodextrina + TiF4 1% após 12 horas de complexação e hidroxipropil-β-ciclodextrina + TiF4 1% após 72 horas de complexação. As amostras foram avaliadas pela microdureza superficial, microdureza transversal e micro-CT. Microscopia eletrônica de varredura / espectrometria de raios X por dispersão de energia (MEV / EDX) foram obtidas. A hidroxipropil-β-ciclodextrina + TiF4 1% após 12h de complexação resultou em um menor percentual de perda de microdureza superficial em comparação com água Mili-Q, hidroxipropil-β-ciclodextrina, TiF4 a 1% e hidroxipropil-β-ciclodextrina + TiF4 1% após 72 horas de complexação com uma ampla magnitude de efeito (de 1,307 a 2,943) e alto poder (84,9 a 99%). Todos os grupos resultaram em similar perda integrada de minerais (ΔZ) obtida por ambas as técnicas de microdureza e micro-CT. O esmalte tratado com os grupos TiF4 e TiF4 + hidroxipropil-β-ciclodextrina apresentou camada de esmalte TiO2, enquanto a avaliação de EDX identificou Ti. A solução contendo o complexo de inclusão de hidroxipropil-β-ciclodextrina + TiF4 com 12 horas de período de complexação demonstrou uma capacidade significativa para reduzir a desmineralização superficial do esmalte hígido sob um desafio cariogênico artificial.

Abstract This study aimed to evaluate the association of contextual and individual factors with Oral Health literacy (OHL) in early adolescence. This is a population-based cross-sectional study carried out with 740 12-year-old adolescents randomly selected by a two-stage probabilistic cluster sampling process from schools in Campina Grande, Brazil. The guardians provided sociodemographic information. Adolescents answered the Brazilian version of the Family Adaptability and Cohesion Scales (FACES III) to measure family functioning, and the Brazilian Rapid Estimate of Literacy in Dentistry (BREALD-30) to measure OHL. Descriptive analysis was conducted, followed by robust Poisson’s regression analysis for complex samples with a multilevel approach (p<0.05). Rate ratio (RR) and 95% confidence intervals (CI) were calculated. The two levels of the analysis were students and schools. Adolescents enrolled at schools with higher grade-retention rate had slightly worse OHL scores (RR = 0.99; 95% CI: 0.98 to 0.99). The following individual factors were associated with the level of OHL: the female sex (RR = 1.05; 95% CI: 1.01 to 1.10), mother’s schooling more than eight years (RR = 1.13; 95% CI: 1.08 to 1.19), younger guardians (RR = 0.94; 95% CI: 0.90 to 0.97) and a balanced family functioning (RR = 1.08; 95% CI: 1.01 to 1.14). Individual and contextual factors were associated with OHL in early adolescence.